This video shows an amazing savant, Stephen Wiltshire, drawing a 5-1/2-foot mural of Rome from the memory of a 45-minute helicopter ride. It took him 3 days, and his perspective and detail are incredibly accurate, as revealed by an overlay of aerial photos.
We are an amazing variety of human beings, aren't we? I contrast this feat with my experience last week: After 3-1/2 hours of staring at and drawing just part of an arrangement of tricycle, open box and ladder, I was still seeing new details. And further contrast: the experience of my friend who finds stick figure representations of people simply daunting.